why等于what for吗,什么时候等于for what
问题描述：
why等于what for吗,什么时候等于for what
在宾语从句中为什么why可以转换为for what 如：Do you know why he is late?这个句子的同义句是Do you know for what he is late,而不是Do you know what for he is late？
答
why副词 adv.1.（用于问句）为什么,为何 Why are you late?你为什么迟到?Why not call on me tomorrow?你干吗不明天就来看我呢?That is why I'm working hard at my lesson.就是这个原因, 我要努力学习.I can't unde...